Home / 21,099.12-29,119.55-12,147.00

Finding the Fourth Proportional to 21,099.12, 29,119.55 and 12,147.00

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Solution

The fourth proportional to 21,099.12, 29,119.55 and 12,147.00 is: 16,764.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,099.12 : 29,119.55 = 12,147.00 : x
  2. Step 2: Convert to fraction form
    21,099.12/29,119.55 = 12,147.00/x
  3. Step 3: Cross multiply
    21,099.12x = 29,119.55 × 12,147.00
  4. Step 4: Simplify right side
    21,099.12x = 353,715,167.71
  5. Step 5: Solve for x
    x = 353,715,167.71/21,099.12
  6. Step 6: Final answer
    x = 16,764.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.